data是不可数名词。但要看具体情况。它本身就是个复数，是datum的复数。作数据时不可数，做资料时可数。
相关介绍
There is some noise in the data which needs to be reduced.
资料里有一些需要删除的不适用信息。
The server is designed to store huge amounts of data.
该服务器是为存储大量数据设计的。
This data was collected from 69 countries.
这资料是从69个国家收集来的。
